Fixes for Coverity reports (A.Dainese)
[u/mrichter/AliRoot.git] / TOF / AliTOFT0maker.cxx
CommitLineData
8f589502 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
6a4e212e 15/* $Id: AliTOFT0maker.cxx,v 1.8 2010/01/19 16:32:20 noferini Exp $ */
8f589502 16
17/////////////////////////////////////////////////////////////////////////////
18// //
19// This class contains the basic functions for the time zero //
6a4e212e 20// evaluation with TOF detector informations. //
21// Use case in an analysis task: //
22// //
23// Create the object in the task constructor (fTOFmaker is a private var) //
5b4ed716 24// AliESDpid *extPID=new AliESDpid(); //
25// fTOFmaker = new AliTOFT0maker(extPID); //
26// fTOFmaker->SetTimeResolution(100.0); // if you want set the TOF res //
6a4e212e 27// 115 ps is the TOF default resolution value //
28// //
29// Use the RemakePID method in the task::Exec //
30// Double_t* calcolot0; //
31// calcolot0=fTOFmaker->RemakePID(fESD); //
32// //calcolot0[0] = calculated event time //
33// //calcolot0[1] = event time time resolution //
34// //calcolot0[2] = average event time for the current fill //
03bd764d 35// //calcolot0[3] = tracks at TOF //
36// //calcolot0[4] = calculated event time (only TOF) //
37// //calcolot0[5] = event time time resolution (only TOF) //
38// //calcolot0[6] = sigma t0 fill //
39// //calcolot0[7] = tracks at TOF really used in tht algorithm //
6a4e212e 40// //
41// Let consider that: //
42// - the PIF is automatically recalculated with the event time subtrction //
8f589502 43// //
44/////////////////////////////////////////////////////////////////////////////
45
536031f2 46#include "AliTOFT0v1.h"
47#include "AliTOFT0maker.h"
536031f2 48#include "AliPID.h"
f858b00e 49#include "AliLog.h"
536031f2 50#include "AliESDpid.h"
03bd764d 51#include "AliESDEvent.h"
52#include "TFile.h"
53#include "TH1F.h"
5b4ed716 54#include "AliTOFcalib.h"
55#include "AliTOFRunParams.h"
56#include "TRandom.h"
f858b00e 57#include "AliTOFHeader.h"
536031f2 58
59ClassImp(AliTOFT0maker)
60
61//____________________________________________________________________________
5b4ed716 62AliTOFT0maker::AliTOFT0maker():
63 TObject(),
64 fT0TOF(NULL),
65 fPIDesd(NULL),
66 fExternalPIDFlag(kFALSE),
67 fTOFcalib(NULL),
68 fNoTOFT0(0),
2a258f40 69 fNmomBins(0),
5b4ed716 70 fTimeResolution(100),
71 fT0sigma(1000),
72 fHmapChannel(0),
73 fKmask(0),
2a258f40 74 fT0width(150.),
75 fT0spreadExt(-1.),
76 fT0fillExt(0)
5b4ed716 77{
78 // ctr
79 fCalculated[0] = 0;
80 fCalculated[1] = 0;
81 fCalculated[2] = 0;
82 fCalculated[3] = 0;
83
5b4ed716 84 if(AliPID::ParticleMass(0) == 0) new AliPID();
85
86 fPIDesd = new AliESDpid();
87
2a258f40 88 fNmomBins = fPIDesd->GetTOFResponse().GetNmomBins();
89 SetTOFResponse();
90
91 fT0TOF = new AliTOFT0v1(fPIDesd);
92
5b4ed716 93}
94//____________________________________________________________________________
95AliTOFT0maker::AliTOFT0maker(AliESDpid *externalPID, AliTOFcalib *tofCalib):
96 TObject(),
97 fT0TOF(NULL),
98 fPIDesd(externalPID),
99 fExternalPIDFlag(kTRUE),
100 fTOFcalib(tofCalib),
03bd764d 101 fNoTOFT0(0),
2a258f40 102 fNmomBins(0),
5b4ed716 103 fTimeResolution(100),
03bd764d 104 fT0sigma(1000),
105 fHmapChannel(0),
5b4ed716 106 fKmask(0),
2a258f40 107 fT0width(150.),
108 fT0spreadExt(-1.),
109 fT0fillExt(0)
536031f2 110{
6a4e212e 111 // ctr
6a4e212e 112 fCalculated[0] = 0;
113 fCalculated[1] = 0;
114 fCalculated[2] = 0;
03bd764d 115 fCalculated[3] = 0;
6a4e212e 116
536031f2 117 if(AliPID::ParticleMass(0) == 0) new AliPID();
03bd764d 118
5b4ed716 119 if(!fPIDesd){
120 fPIDesd = new AliESDpid();
121 fExternalPIDFlag = kFALSE;
122 }
123
2a258f40 124 fNmomBins = fPIDesd->GetTOFResponse().GetNmomBins();
125 SetTOFResponse();
5b4ed716 126
2a258f40 127 fT0TOF = new AliTOFT0v1(fPIDesd);
8f589502 128
8f589502 129}
5b4ed716 130
8f589502 131//____________________________________________________________________________
536031f2 132AliTOFT0maker::~AliTOFT0maker()
133{
134 // dtor
5b4ed716 135
136 delete fT0TOF;
137 if (!fExternalPIDFlag) delete fPIDesd;
536031f2 138}
139//____________________________________________________________________________
5b4ed716 140Double_t* AliTOFT0maker::ComputeT0TOF(AliESDEvent *esd,Double_t t0time,Double_t t0sigma){
8f589502 141 //
142 // Remake TOF PID probabilities
143 //
144
2a258f40 145 Double_t t0tof[6];
536031f2 146
03bd764d 147 if(fKmask) ApplyMask(esd);
148
2a258f40 149 Double_t t0fill = 0.;
150
151 fPIDesd->GetTOFResponse().ResetT0info();
152
5b4ed716 153 /* get T0 spread from TOFcalib if available otherwise use default value */
154 if (fTOFcalib && esd) {
155 AliTOFRunParams *runParams = fTOFcalib->GetRunParams();
156 if (runParams && runParams->GetTimestamp(0) != 0) {
157 Float_t t0spread = runParams->EvalT0Spread(esd->GetTimeStamp());
2a258f40 158 if(fT0spreadExt > 0) SetT0FillWidth(fT0spreadExt);
159 else{
160 SetT0FillWidth(t0spread);
161 t0fill = fT0fillExt;
162 }
163 }
164 else{
90beec49 165 if(fT0spreadExt > 0) SetT0FillWidth(fT0spreadExt);
2a258f40 166 t0fill = fT0fillExt;
5b4ed716 167 }
536031f2 168 }
bc4fdef6 169 else if(esd){
170 Float_t t0spread = esd->GetSigma2DiamondZ(); // vertex pread ^2
171 if(t0spread > 0) t0spread = TMath::Sqrt(t0spread)/0.0299792458;
172
173 if(fT0spreadExt > 0) SetT0FillWidth(fT0spreadExt);
174 else{
175 SetT0FillWidth(t0spread);
176 t0fill = fT0fillExt;
177 }
178 }
03bd764d 179
bf40b7fa 180 Float_t thrGood = TMath::Max(Float_t(500.),fT0width*3);
181
5b4ed716 182 fT0TOF->Init(esd);
183 AliTOFT0v1* t0maker= fT0TOF;
5b4ed716 184
185 t0maker->DefineT0("all",1.5,3.0);
186 t0tof[0] = t0maker->GetResult(0);
187 t0tof[1] = t0maker->GetResult(1);
188 t0tof[2] = t0maker->GetResult(2);
189 t0tof[3] = t0maker->GetResult(3);
2a258f40 190 t0tof[4] = t0maker->GetResult(4);
191 t0tof[5] = t0maker->GetResult(5);
536031f2 192
8f589502 193 Float_t lT0Current=0.;
536031f2 194 fT0sigma=1000;
195
03bd764d 196// Int_t nrun = esd->GetRunNumber();
5b4ed716 197
03bd764d 198 t0time += t0fill;
8f589502 199
5b4ed716 200 Float_t sigmaFill = fT0width;
201
202 if(sigmaFill < 20) sigmaFill = 140;
8f589502 203
03bd764d 204 fCalculated[0]=-1000*t0tof[0]; // best t0
205 fCalculated[1]=1000*t0tof[1]; // sigma best t0
206 fCalculated[2] = t0fill; //t0 fill
207 fCalculated[3] = t0tof[2]; // n TOF tracks
208 fCalculated[4]=-1000*t0tof[0]; // TOF t0
209 fCalculated[5]=1000*t0tof[1]; // TOF t0 sigma
210 fCalculated[6]=sigmaFill; // sigma t0 fill
211 fCalculated[7] = t0tof[3]; // n TOF tracks used for T0
212
bf40b7fa 213 if(fCalculated[7] > 30) thrGood = 10000000;
214
2a258f40 215 //statistics
216 fCalculated[8] = t0tof[4]; // real time in s
217 fCalculated[9] = t0tof[5]; // cpu time in s
218
bf40b7fa 219 if(fCalculated[1] < sigmaFill && TMath::Abs(fCalculated[0] - t0fill) < thrGood && fCalculated[1] < fTimeResolution*1.2){
6a4e212e 220 fT0sigma=fCalculated[1];
221 lT0Current=fCalculated[0];
536031f2 222 }
03bd764d 223 else{
224 fCalculated[4] = t0fill;
225 fCalculated[5] = sigmaFill;
226 }
227
5b4ed716 228 if(fCalculated[1] < 1 || fT0sigma > sigmaFill || fCalculated[1] > fTimeResolution* 1.2){
03bd764d 229 fT0sigma =1000;
230 fCalculated[4] = t0fill;
231 fCalculated[5] = sigmaFill;
232 }
536031f2 233
234 if(t0sigma < 1000){
235 if(fT0sigma < 1000){
236 Double_t w1 = 1./t0sigma/t0sigma;
6a4e212e 237 Double_t w2 = 1./fCalculated[1]/fCalculated[1];
536031f2 238
239 Double_t wtot = w1+w2;
240
6a4e212e 241 lT0Current = (w1*t0time + w2*fCalculated[0]) / wtot;
536031f2 242 fT0sigma = TMath::Sqrt(1./wtot);
243 }
244 else{
8f589502 245 lT0Current=t0time;
536031f2 246 fT0sigma=t0sigma;
247 }
248 }
249
bf40b7fa 250 if(fT0sigma < sigmaFill && TMath::Abs(lT0Current - t0fill) < thrGood){
03bd764d 251 fCalculated[1]=fT0sigma;
252 fCalculated[0]=lT0Current;
253 }
254
255 if(fT0sigma >= 1000 || fNoTOFT0){
8f589502 256 lT0Current = t0fill;
03bd764d 257 fT0sigma = sigmaFill;
8f589502 258
6a4e212e 259 fCalculated[0] = t0fill;
03bd764d 260 fCalculated[1] = sigmaFill;
536031f2 261 }
262
5b4ed716 263 // T0 pt bin
2a258f40 264 if(fCalculated[7] < 100){
265 for(Int_t i=0;i<fNmomBins;i++){
266 t0maker->DefineT0("all",fPIDesd->GetTOFResponse().GetMinMom(i),fPIDesd->GetTOFResponse().GetMaxMom(i));
267 t0tof[0] = t0maker->GetResult(0);
268 t0tof[1] = t0maker->GetResult(1);
269 t0tof[2] = t0maker->GetResult(2);
270 t0tof[3] = t0maker->GetResult(3);
271
272
273 Float_t t0bin =-1000*t0tof[0]; // best t0
274 Float_t t0binRes =1000*t0tof[1]; // sigma best t0
275
bf40b7fa 276 if(t0binRes < sigmaFill && t0binRes < fTimeResolution * 1.2 && TMath::Abs(t0bin - t0fill) < thrGood){
2a258f40 277 // Ok T0
278 if(t0sigma < 1000){
279 Double_t w1 = 1./t0sigma/t0sigma;
280 Double_t w2 = 1./t0binRes/t0binRes;
281
282 Double_t wtot = w1+w2;
283
284 t0bin = (w1*t0time + w2*t0bin) / wtot;
285 t0binRes = TMath::Sqrt(1./wtot);
286 }
287 }
288 else{
289 t0bin = t0fill;
290 t0binRes = sigmaFill;
291 if(t0sigma < 1000){
292 t0bin = t0time;
293 t0binRes= t0sigma;
294 }
295 }
296 fPIDesd->GetTOFResponse().SetT0bin(i,t0bin);
297 fPIDesd->GetTOFResponse().SetT0binRes(i,t0binRes);
5b4ed716 298 }
2a258f40 299 }
300 else{
301 for(Int_t i=0;i<fNmomBins;i++){
302 fPIDesd->GetTOFResponse().SetT0bin(i,lT0Current);
303 fPIDesd->GetTOFResponse().SetT0binRes(i,fT0sigma);
5b4ed716 304 }
305 }
536031f2 306
6a4e212e 307 return fCalculated;
536031f2 308}
309//____________________________________________________________________________
5b4ed716 310Double_t *AliTOFT0maker::GetT0p(Float_t p){// [0]=to -- [1] = sigma T0
2a258f40 311 Int_t i=fPIDesd->GetTOFResponse().GetMomBin(p);
03bd764d 312
2a258f40 313 fT0cur[0] = fPIDesd->GetTOFResponse().GetT0bin(i);
314 fT0cur[1] = fPIDesd->GetTOFResponse().GetT0binRes(i);
315
5b4ed716 316 return fT0cur;
536031f2 317}
318//____________________________________________________________________________
5b4ed716 319void AliTOFT0maker::SetTOFResponse(){
2a258f40 320 fPIDesd->GetTOFResponse().SetTimeResolution(fTimeResolution);
5b4ed716 321}
322//____________________________________________________________________________
323Float_t AliTOFT0maker::GetExpectedSigma(Float_t mom, Float_t tof, Float_t mass){
5b4ed716 324 Float_t sigma = fPIDesd->GetTOFResponse().GetExpectedSigma(mom,tof,mass);
8f589502 325
5b4ed716 326 return sigma;
536031f2 327}
328//____________________________________________________________________________
5b4ed716 329void AliTOFT0maker::ApplyT0TOF(AliESDEvent *esd){
8f589502 330 //
5b4ed716 331 // Recalculate TOF PID probabilities
8f589502 332 //
333
90beec49 334// subtruct t0 for each track
335 Int_t ntracks = esd->GetNumberOfTracks();
536031f2 336
90beec49 337 while (ntracks--) {
338 AliESDtrack *t=esd->GetTrack(ntracks);
03bd764d 339
90beec49 340 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
5b4ed716 341
90beec49 342 Double_t time=t->GetTOFsignal();
343 Float_t p = t->GetP();
344
345 Double_t *t0=GetT0p(p);
346 time -= t0[0];
347 t->SetTOFsignal(time);
348 }
349
350 for(Int_t i=0;i<fNmomBins;i++){
351 fPIDesd->GetTOFResponse().SetT0bin(i,0.0);
352 }
353
5b4ed716 354 //
536031f2 355}
03bd764d 356//____________________________________________________________________________
357void AliTOFT0maker::LoadChannelMap(char *filename){
358 // Load the histo with the channel off map
359 TFile *f= new TFile(filename);
360 if(!f){
361 printf("Cannot open the channel map file (%s)\n",filename);
362 return;
363 }
364
365 fHmapChannel = (TH1F *) f->Get("hChEnabled");
366
367 if(!fHmapChannel){
368 printf("Cannot laod the channel map histo (from %s)\n",filename);
369 return;
370 }
371
372}
373//____________________________________________________________________________
374void AliTOFT0maker::ApplyMask(AliESDEvent * const esd){
375 // Switch off the disable channel
376 if(!fHmapChannel){
377 printf("Channel Map is not available\n");
378 return;
379 }
380
381 Int_t ntracks = esd->GetNumberOfTracks();
382
383 while (ntracks--) {
384 AliESDtrack *t=esd->GetTrack(ntracks);
385
386 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
387
388 Int_t chan = t->GetTOFCalChannel();
389
390 if(fHmapChannel->GetBinContent(chan) < 0.01){
391 t->ResetStatus(AliESDtrack::kTOFout);
392 }
393 }
394}
395
5b4ed716 396Float_t
397AliTOFT0maker::TuneForMC(AliESDEvent *esd){ // return true T0 event
398 //
399 // tune for MC data
400 //
401
402 Float_t TOFtimeResolutionDefault=80;
403
404 Float_t t0 = gRandom->Gaus(0.,fT0width);
405
406 Float_t extraSmearing = 0;
407
408 if(fTimeResolution > TOFtimeResolutionDefault){
409 extraSmearing = TMath::Sqrt(fTimeResolution*fTimeResolution - TOFtimeResolutionDefault*TOFtimeResolutionDefault);
410 }
411
412 // subtruct t0 for each track
413 Int_t ntracks = esd->GetNumberOfTracks();
414
415 while (ntracks--) {
416 AliESDtrack *t=esd->GetTrack(ntracks);
417
418 if ((t->GetStatus()&AliESDtrack::kTOFout)==0) continue;
419
420 /* check if channel is enabled */
bc4fdef6 421 if (fTOFcalib){
422 if(!fTOFcalib->IsChannelEnabled(t->GetTOFCalChannel())) {
423 /* reset TOF status */
424 t->ResetStatus(AliESDtrack::kTOFin);
425 t->ResetStatus(AliESDtrack::kTOFout);
426 t->ResetStatus(AliESDtrack::kTOFmismatch);
427 t->ResetStatus(AliESDtrack::kTOFpid);
428 }
5b4ed716 429 }
430
431 Double_t time=t->GetTOFsignal();
432
433 time += t0;
434
435 if(extraSmearing>0){
436 Float_t smearing = gRandom->Gaus(0.,extraSmearing);
437 time += smearing;
438 }
439
440 t->SetTOFsignal(time);
441 }
442 //
443 return t0;
444}
f858b00e 445//_________________________________________________________________________
446void AliTOFT0maker::WriteInESD(AliESDEvent *esd){
447 //
448 // Write t0Gen, t0ResGen, nt0;
449 // t0resESD[0:nt0], it0ESD[0:nt0]
450 // in the AliESDEvent
451 //
452 Int_t nMomBins = fPIDesd->GetTOFResponse().GetNmomBins();
453
454 Int_t nt0=0;
455 Float_t *t0 = new Float_t[nMomBins];
456 Float_t *t0res = new Float_t[nMomBins];
457 Int_t *multT0 = new Int_t[nMomBins];
458
459 for(Int_t i=0;i<nMomBins;i++){
460// printf("START %i) %f %f\n",i,fT0event[i],fT0resolution[i]);
461 multT0[i]=0;
462 Bool_t kNewT0=kTRUE;
463 for(Int_t j=0;j < nt0;j++){
464 if(TMath::Abs(fPIDesd->GetTOFResponse().GetT0bin(i) - t0[j])<0.1){
465 kNewT0=kFALSE;
466 multT0[j]++;
467 j=nMomBins*10;
468 }
469 }
470 if(kNewT0){
471 t0[nt0]=fPIDesd->GetTOFResponse().GetT0bin(i);
472 t0res[nt0]=fPIDesd->GetTOFResponse().GetT0binRes(i);
473 nt0++;
474 }
475 }
476
477 Int_t iMultT0=0,nmult=0;
478 for(Int_t j=0;j < nt0;j++){ // find the most frequent
479 if(multT0[j] > nmult){
480 iMultT0 = j;
481 nmult = multT0[j];
482 }
483 }
484
485 Float_t *t0ESD = new Float_t[nMomBins];
486 Float_t *t0resESD = new Float_t[nMomBins];
487 Int_t *it0ESD = new Int_t[nMomBins];
488
489 Float_t t0Gen,t0ResGen;
490 t0Gen = t0[iMultT0];
491 t0ResGen = t0res[iMultT0];
492 nt0=0;
493 // printf("T0 to ESD\n%f %f\n",t0Gen,t0ResGen);
494 for(Int_t i=0;i<nMomBins;i++){
495 if(TMath::Abs(fPIDesd->GetTOFResponse().GetT0bin(i) - t0Gen)>0.1){
496 t0ESD[nt0]=fPIDesd->GetTOFResponse().GetT0bin(i);
497 t0resESD[nt0]=fPIDesd->GetTOFResponse().GetT0binRes(i);
498 it0ESD[nt0]=i;
499// printf("%i) %f %f %i\n",nt0,t0ESD[nt0],t0resESD[nt0],it0ESD[nt0]);
500 nt0++;
501 }
502 }
503
504 // Write t0Gen,t0ResGen; nt0; t0resESD[0:nt0],it0ESD[0:nt0] in the AliESDEvent
505
506 AliTOFHeader *tofHeader =
507 new AliTOFHeader(t0Gen,t0ResGen,nt0,
c85a1b24 508 t0ESD,t0resESD,it0ESD,fTimeResolution,fT0width);
f858b00e 509
510 esd->SetTOFHeader(tofHeader);
511
c85a1b24 512 AliDebug(1,Form("resTOF=%f T0spread=%f t0Gen=%f t0resGen=%f",fTimeResolution,fT0width,t0Gen,t0ResGen));
513 AliDebug(1,Form("%d ",nt0));
f858b00e 514 for (Int_t ii=0; ii<nt0; ii++)
c85a1b24 515 AliDebug(1,Form("pBin=%d t0val=%f t0res=%f",it0ESD[ii],t0ESD[ii],t0resESD[ii]));
f858b00e 516
517 delete[] t0;
518 t0 = NULL;
519 delete[] t0res;
520 t0res = NULL;
521 delete[] multT0;
522 multT0 = NULL;
523 delete[] t0ESD;
524 t0ESD = NULL;
525 delete[] t0resESD;
526 t0resESD = NULL;
527 delete[] it0ESD;
528 it0ESD = NULL;
529
530}